Pioneer PDP-61MXE1 Technical Manual page 25

Special Installation (Ceiling suspension (with wires))
Methods of Securing: Basic methods of securing are shown below. Avoid blocking or covering areas aside from those
indicated by . Before attaching the unit to fittings, double-check that the thickness and height
of the fittings, and the number of fixing bolts is correct. (Also refer to 2.4.1 "Mounting to fittings
(pg. 21)".)
Vertical suspension
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